* If "look" refers to a physical appearance, the plural is looks. Example: "She has good looks."
* If "look" refers to a glance or a way of looking, the plural is looks. Example: "He gave me a few surprised looks."
* If "look" is part of a phrase like "look up" or "look out", it doesn't have a plural form. You'd say "look ups" or "look outs."
So, the answer depends on the specific meaning of "look" in your sentence.